Dear Rabbi,
Would you care to comment on the following?( The FDA site is difficult to navigate)
This was part of a larger article at
http://www.kashrut.com/articles/ReleaseAgents/

The Gemora (Pesachim 30b) quotes a Baraissah that one should not bake bread on an oven surface that had been smeared with Kosher animal fat, since the fat would render the bread fleishig thus violating the injunction that all bread must be Pareve. Non-Kosher fats, of course, would certainly render the bread unacceptable, and their use has historically been one of the greatest obstacles to Kosher certification. To complicate matters, such “release agents”, as they are known industrially, are not technically considered “ingredients” under U.S. food law, since they are not integral to the product itself. Rather, they are considered “processing aids”, which need not be listed on the ingredient declaration.
Cheers,
Martin